@Christoph-Hart No, I don't mean for one note to choke itself. For example, lets take A, B and C notes.
A can choke B and C
B can choke A and C
C can choke A and B
But,
A can't choke A
B can't choke B
C can't choke C
So, each note follows the polyphony of the sampler, but choke group creates monophony only between different notes. Makes sense?